/**
 * @author 陈泰来
 * @version V1.0
 * @Project echo-java-base
 * @Title 观察者接口
 * @Description *
 * @Package designmodel.observe2.observer
 * @date 2021/3/4 11:32 上午
 * @Copyright:学如逆水行舟，不进则退 .
 */
package designmodel.observe2.observer;

public interface Observer {

    void update(String action);
}
